Caught doing this in a Spanish tunnel? It could cost you €500 and 6 points

If you overtake in the wrong conditions inside a tunnel in Spain, you could be facing a fine of up to €500 and the loss of up to six points on your licence. It is one of those rules that many drivers think they understand, but in practice, it is often misread or ignored. The DGT is now reminding motorists that tunnels are not the place to take risks, and that a simple mistake can quickly turn into a serious offence.

Tunnels are different from open roads. Light changes suddenly, space is tighter, and there is very little room to react if something unexpected happens. That is exactly why the rules are stricter, and why penalties can be higher.

When overtaking in a tunnel becomes illegal in Spain

The basic rule is simple. If there is only one lane in each direction, overtaking is not allowed. It does not matter if the car in front is slow or if the road looks clear. If you need to move into the opposite lane to pass, you are breaking the law.

There is only one situation where overtaking is allowed inside a tunnel. That is when there are two or more lanes going in the same direction and you can pass without crossing into oncoming traffic. In those cases, you stay within your side of the road, and the manoeuvre is considered safe enough.

The problem is that many drivers rely on instinct rather than the actual layout of the road. A tunnel can feel wide, visibility can seem decent, and the temptation to overtake is there. But what feels safe in the moment is not how the law sees it.

The DGT insists that tunnels require more attention than normal driving. There is less margin for error, and any incident inside can escalate quickly. A broken down vehicle, a sudden stop, or a misjudged manoeuvre can create a chain reaction in a space where options are limited.

The fine and points that can hit your licence

The penalty depends on how serious the situation is judged to be. In less dangerous cases, the fine can be €200. But if the manoeuvre creates a clear risk for other road users, that amount can rise to €500.

On top of that, points can be taken from your licence. If the overtake puts others at risk or is carried out in conditions where visibility is reduced, you can lose four points. If the behaviour is considered reckless, the loss increases to six points.

That distinction matters. Authorities do not just look at the action itself, they look at the context. Overtaking in a tunnel where visibility is limited or traffic is unpredictable is more likely to be treated as a serious offence.

For many drivers, especially those who rely on their licence for work, losing that many points can have long term consequences. It is not just about the fine, it is about staying on the road.

The small tunnel rules drivers often forget

Overtaking is not the only rule that applies. There are a few basic things that drivers are expected to do every time they enter a tunnel, and these are often overlooked.

Lights are one of them. Even during the day, you must switch on your lights when entering a tunnel. It is not just about seeing clearly, it is about making sure other drivers can see you in a space where lighting can change suddenly.

Distance is another key point. Drivers are expected to keep at least 100 metres, or around four seconds, from the vehicle in front. For heavier vehicles, that distance increases further. In a confined space like a tunnel, that gap can make a big difference if traffic slows down abruptly.

You should also never enter a tunnel if traffic is already stopped inside or if a red signal is shown at the entrance. These signals are there for a reason, and ignoring them can lead to dangerous congestion in a place where movement is already restricted.

If traffic comes to a halt while you are inside, the safest approach is to keep your distance, switch on your hazard lights, and stay alert. These are simple actions, but they help prevent situations from getting worse.

What happens if you get fined in Spain

If you are reported for an offence in a tunnel, the process follows the usual traffic penalty system. You will have 20 days to either pay the fine or challenge it.

Paying within that period usually means you can reduce the amount by 50 per cent. However, accepting that reduction also means you give up the option to appeal later.

For many drivers, the decision is practical. If the offence is clear, paying the reduced fine can be the easiest way forward. If there is doubt about what happened, then contesting the penalty may be worth considering.

Why tunnels are treated differently on Spanish roads

Driving through a tunnel might feel routine, especially if you use the same route every day. But from a traffic safety point of view, these stretches are treated as high risk areas.

There is less visibility, fewer escape options, and limited space to deal with unexpected situations. That is why the rules are stricter and why enforcement is taken seriously.

The message from the DGT is not complicated. Inside a tunnel, patience matters more than speed. Waiting a few extra seconds behind another vehicle is always safer than taking a risk that could cost you money, points, or worse.

For anyone driving in Spain, it is a reminder that some of the simplest habits behind the wheel are also the most important.